Matsya Purana — Division of Bhārata-varṣa
द्वीपो ह्युपनिविष्टो ऽयं म्लेच्छैरन्तेषु सर्वशः यवनाश्च किराताश्च तस्यान्ते पूर्वपश्चिमे //
dvīpo hyupaniviṣṭo 'yaṃ mlecchairanteṣu sarvaśaḥ yavanāśca kirātāśca tasyānte pūrvapaścime //
This island-continent is indeed settled on all sides at its borders by mlecchas (foreign peoples); and the Yavanas and the Kirātas dwell at its eastern and western extremities.
Nothing directly about pralaya is stated here; the verse is a cosmographic note describing how a dvīpa’s border regions are inhabited by various foreign or peripheral peoples.
Indirectly, it frames a king’s realm within a broader world of frontier communities—useful for understanding borderlands, diplomacy, and governance of peripheral groups mentioned in Purāṇic geography.
No explicit Vāstu or ritual rule appears in this verse; its primary significance is geographical-ethnographic, locating Yavanas and Kirātas at the dvīpa’s extremities.